I took my almost 3 year old stepson to a birthday party last Saturday. He doesn't even speak in full sentences yet but he talks about this friend occasionally so it's obvious this is his first 'best friend'. It was fairly last minute because his mum received the invitation and didn't realise it was on our weekend, so she asked me.
I get on with my stepson's mother very well. I wouldn't say we're friends but as close as you can get. We communicate with each other directly.
I went to the party and everyone was giving me the stink eye. At first I thought I was being paranoid until one of the other mums came up to me and asked how I thought [stepson's mum] would feel about me being here, and not in a particularly nice way. His mum literally texted me to say 'thanks for rearranging plans and taking SS, I think it's important to him'.
It was pretty shit especially because I was actually looking forward to meeting some of his friends, and their mothers. I get the same look when I go to pick up SS from nursery, and it's clear to me now I'm not imagining it.
Anyway, vent over.